Cable anchorage



March 3, 1936. c. KENDALL 2,032,703

CABLE ANCHORAGE Filed May 10, 1933 2 Sheets-Sheet l I 4 1 J m 7; H 5

lwljenfoi'r CLEMENT K5 0/4 44, y: I

March 3', 1936. c. KENDALL I 2,032,703

CABLE ANCHORAGE FiledMay 10, 1933 2 Sheets-Sheet 2 6%!07: C4 ENE/VTKENDQLL Patented Mar. 3, 1936 UNETED STATES PATENT OFFICE 4 Claims.

This invention relates to a novel method and apparatus for anchoringcables, and more particularly to that type of cable composed of amultiplicity of strands, and widely used in the construction ofsuspension bridges and the like.

One object of the present invention is to provide a novel method andapparatus for enabling the complete installation of a strand anchorageframe before the cable ends are tensioned and secured thereto.

Another object is the provision of a novel fabricated strand anchorageframe which is easily assembled after being connected to theconventional anchorage bars and before the cable ends are introducedinto the frame.

A further object is to provide novel cable end sockets and bearingblocks to cooperate with the strand anchorage frame of the invention insuch manner as to enable a most rapid and accurate 20 anchorage forcables of the classdescribed.

These and still further objects of the invention will be apparent afterreferring to the drawings, in which:

Figure 1 is an end elevation of the apparatus of 25 the invention.

Figure 2 is an enlarged detail elevation.

Figure 3 is a fragmentary plan.

Figure 4 is a view on the line IVIV of Figure 2.

Figure5 is a sectional detail of the novel bearing blocks and cable endsockets of the invention.

Figure 6 is a perspective view of a shim used for spacing the cable endsockets from the bearing blocks.

Figure '7 is an enlarged detail elevation of a modification of theinvention.

Figure 8 is a sectional view of the line VIII- VIII of Figure '7.

Figure 9 is a perspective view of a modified form of shim formaintaining the cables in tensioned position.

Referring more particularly to the drawings, the numeral 2 designates afoundation of cement or other anchorage material, to which it is desiredto anchor the cables of suspension bridges and the like.

A number of channels 3, or other structural shapes, are embedded in thefoundation 2 and connected to the eyelets 4 of a plurality of anchoragebars 4 by means of rods 5. The other extremities of the anchorage bars 4extend out of the foundation 2 and are provided with eyelets 4.

A plurality of channel members 6 are provided with smaller interfittingreenforcing channels 1 and the two secured together, as by rivetingtheir webs, as at 8. Each unit, composed of the channels .6 and "I, isbored to enable connection with the eyelets 4 of the anchorage bars 4,and disposed with its flanges facing the flanges of the 5 next adjacentunit, properly spaced relative to each other and secured together ateach corner of the assembly by means of continuous angle members 9,which are bolted along their respective lengths, as at [0.

The units composed of the channels 6 and 1 are also connected togetherby smaller angle members l2 which are secured to the flanges of theoutside channels of adjacent face-to-face assemblies.

In practice, the distance between the facing edges of the flanges ofchannels 6 and 'l is slightly greater than the thickness of the eyelets4 of the anchorage bars, permitting them to be secured to the units bymeans of pins I4 which extend throughout their length and are held inposition by means of nuts l5 which are threaded on their ends.

The cables to be anchored, indicated at l6, are each provided with aT-shaped bearing block I1, of such dimensions as to pass through thespaces between the webs of the outside channels 6 of adjacentface-to-face unit assemblies when its longest surface is verticallydisposed. A socket I8 is provided for each of the cable ends and is cutout as at H! to enable the usual brooming and soldering. The sockets [8are of dimensions similar to those of the bearing blocks I! in that theytoo are capable of passing between the webs of adjacent channels 6 whentheir longest surfaces are vertically disposed.

Suitable shims 20 are provided for spacing the sockets I8 from thebearing blocks I! in order to tension the cables Hi.

In installing the device of the invention, the two top angles 9 areunbolted and removed. This permits the introduction of the anchorage bareyelets 4 between the face-to-face units of the channels 6 and 1 of theanchorage frame. The lowermost of the anchorage bar pins I4 is theninserted through the apertures in the units 6 and 1 and the eyelets 4The operation is continued until the remaining eyelets 4 are installed.The two bottom angles 9 are then unbolted, after which the wholeanchorage frame is drawn taut by tightening the nuts I5, or other means.The bolt holes in the angles 9 are preferably reamed and the structurepermanently secured as by bolting, shown at [0, it being understood thatthe use of larger bolts will be necessary after the reaming than thoseformerly used.

The cables I6 are tensioned, and the sockets 18 on their ends, togetherwith the bearing blocks I1, are drawn through the openings between thewebs 6 of the channel units and turned at right angles to prevent theirmovement out of the strand anchorage frame.

A sufficient number of shims 20 are inserted between the sockets l8 andbearing blocks l1 and the tension on the cables l6 released, permittingboth socket and bearing block to rest 0 the adjacent small angle memberl2.

Referring to Figures 7, 8 and 9, a modified form of the invention isdisclosed .as embodying 2|. In practicing this form of the invention,

the combined socket and bearing blocks 2! are I cut out, as at 22, toenable brooming and soldering, and an extension 2| a provided fordisposal between adjacent back-to-back channel memb'ers 6. The combinedcable end socket and bearing blocks are spaced from the anchorage frame,in order to tension the cables l6, by means of .a modified form of shim23.

7 While I have shown and described several specific embodiments of myinvention, it will be understood that I do not wish to be limitedexactly thereto, since various modifications may be made withoutdeparting from the scope of my invention, as definedin the followingclaims.

I claim: 1

1. A cable anchorage comprising, in combination, an anchorage frame,said anchorage frame being composed of a plurality of channels arrangedin pairs with their respective web portions in adjacent relationship, asmaller channel disposed within and secured to each of said first namedchannels, a plurality of anchor bars having their ends disposed betweenthe ends of the respective flange portions of adjacent pairs of saidfirst named channels, said anchor bars being connected to said anchorageframe, a plu-, rality of cables'disposed between the adjacent webportions of each pair of said-first named channels, a bearing blockplaced on each of said cables, a socket secured tothe end of each ofsaid cables, and a plurality of elongated angle members for maintainingsaid first named channels in spaced relationship with respect to eachother, said sockets and bearing blocks being,

adapted to pass between the web portions of adjacent pairs of said firstnamed channel members when disposed in a determined position and,

tion, an anchorage frame, said anchorage frame being composed of aplurality ,ofohannels' arranged. in pairs with theirrespective web"portions in adjacent relationship, a'smaller chan-- nel disposed withinand secured to-each of saidrality of cables disposed between theadjacent web portions of each pair of said first named channels, abearing block placed on each of said cables, a socket secured to the endof each of said cables, a plurality of elongated angle members formaintaining said first named channels in spaced relationship withrespect to each other, said sockets and bearing blocks being adapted topass between the web portions of adjacent pairs of said first namedchannel members when disposed in a determined position and to be lockedagainst returning therethrough by being partially rotated on their axes,and a plurality of small angle members disposed between and secured toeach pair of said first named channels, whereby each of said small anglemembers provides a seat for the socket and bearing block on one of saidcables.

3. A cable anchorage comprising, in combination, an anchorage frame,said anchorage frame being composed of .a plurality of channels arrangedin pairs with their respective web portions in adjacent relationship, aplurality of anchor bars having their ends disposed between the ends ofthe respective flange portions of adjacent pairs of said channels, saidanchor bars being connected to said anchorage frame, a plurality ofcables disposed between the adjacent web portions of each pair of saidchannels, a bearing block placed on each of said cables, a socketsecured to the end of each of said cables, and a plurality of elongatedangle members for maintaining said channels in spaced relationship withrespect to each other, said sockets and bearing blocks being adapted topass between the web portions of adjacent pairs of said channel memberswhen disposed in a determined position and to be locked againstreturning therethrough by being partially rotated on their axes.

4. A cable anchorage comprising, in combination, an anchorage frame,said anchorage frame being composed of a plurality of channels arrangedin pairs with their respective web portions in .adjacent relationship, aplurality of anchor bars having their ends disposed between the ends ofthe respective flange portions of adja cent pairs of saidichannels, saidanchor bars being connected to said anchorage frame, a plurality ofcables disposed between the adjacent Web portions of each pair of saidchannels, a bearing block placed on each of said cables, a socketsecured to the end of each of said cables, and a plurality of elongatedangle members for maintaining said channels in spaced relationship withrespect to each other, said sockets and bearing blocks being adapted topass between the web portions of adjacent pairs of said channel memberswhen disposed in a determined position and to be locked againstreturning therethrough by being partially rotated on their axes and aplurality of small angle members disposed between and secured to eachpair of said channels, whereby each of said small angle members providesa seat for the socket and bearing block on one of said cables.

CLEMENT KENDALL.

